class Trangle{
double sideA,sideB,sideC,area,length;
boolean boo;
public Trangle(double a,double b,double c)
{
this.sideA=a;
this.sideB=b;
this.sideC=c;
if(this.sideA+this.sideB>this.sideC&&this.sideA+this.sideC>this.sideB&&this.sideB+this.sideC>this.sideA)
{
this.boo=true;
}
else
{
this.boo=false;
}
return boo;
}
public double getLength(){
if(this.sideA+this.sideB>this.sideC&&this.sideA+this.sideC>this.sideB&&this.sideB+this.sideC>this.sideA)
{
double p=(sideA+sideB+sideC)/2.0;
area=Math.sqrt(p*(p-sideA)*(p-sideB)*(p-sideC));
return area;
}
else
{
System.out.println("不是一个三角形，不能计算面积");
return 0;
}
}
public void setABC(double a,double b,double c)
{
this.sideA=a;
this.sideB=b;
this.sideC=c;
if(this.sideA+this.sideB>this.sideC&&this.sideA+this.sideC>this.sideB&&this.sideB+this.sideC>this.sideA)
{
this.boo=true;
}
else
{
this.boo=false;
}
}
}
class Lader{
double above,bottom,height,area;
Lader(double a,double b,double h)
{
this.above=a;
this.bottom=b;
this.height=h;
}
public double getArea(){
this.area=(this.above+this.bottom)*this.height/2;
return this.area;
}
}
public class AreaAndLength {
public static void main(String[] args)
{
double length,area;
Trangle trangle=null;
Lader lader;
trangle=new Trangle();
lader=new Lader();
length=trangle.getLength();
System.out.println("三角形的周长："+length);
area=trangle.getArea();
System.out.println("三角形的面积："+area);
area=lader.getArea();
System.out.println("梯形的面积："+area);
trangle.setABC(12,34,1);
area=trangle.getArea();
System.out.println("三角形的面积："+area);
length=trangle.getLength();
System.out.println("三角形的周长："+length);
}
}class Trangle{
double sideA,sideB,sideC,area,length;
boolean boo;
public Trangle(double a,double b,double c)
{
this.sideA=a;
this.sideB=b;
this.sideC=c;
if(this.sideA+this.sideB>this.sideC&&this.sideA+this.sideC>this.sideB&&this.sideB+this.sideC>this.sideA)
{
this.boo=true;
}
else
{
this.boo=false;
}
return boo;
}
public double getLength(){
if(this.sideA+this.sideB>this.sideC&&this.sideA+this.sideC>this.sideB&&this.sideB+this.sideC>this.sideA)
{
double p=(sideA+sideB+sideC)/2.0;
area=Math.sqrt(p*(p-sideA)*(p-sideB)*(p-sideC));
return area;
}
else
{
System.out.println("不是一个三角形，不能计算面积");
return 0;
}
}
public void setABC(double a,double b,double c)
{
this.sideA=a;
this.sideB=b;
this.sideC=c;
if(this.sideA+this.sideB>this.sideC&&this.sideA+this.sideC>this.sideB&&this.sideB+this.sideC>this.sideA)
{
this.boo=true;
}
else
{
this.boo=false;
}
}
}
class Lader{
double above,bottom,height,area;
Lader(double a,double b,double h)
{
this.above=a;
this.bottom=b;
this.height=h;
}
public double getArea(){
this.area=(this.above+this.bottom)*this.height/2;
return this.area;
}
}
public class AreaAndLength {
public static void main(String[] args)
{
double length,area;
Trangle trangle=null;
Lader lader;
trangle=new Trangle();
lader=new Lader();
length=trangle.getLength();
System.out.println("三角形的周长："+length);
area=trangle.getArea();
System.out.println("三角形的面积："+area);
area=lader.getArea();
System.out.println("梯形的面积："+area);
trangle.setABC(12,34,1);
area=trangle.getArea();
System.out.println("三角形的面积："+area);
length=trangle.getLength();
System.out.println("三角形的周长："+length);
}
} |
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